Commit | Line | Data |
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94bd2708 DN |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
361916a9 | 6 | * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. |
94bd2708 DN |
7 | */ |
8 | ||
9 | /* | |
10 | * Cross Partition Communication (XPC) uv-based functions. | |
11 | * | |
12 | * Architecture specific implementation of common functions. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
5b8669df DN |
17 | #include <linux/mm.h> |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/device.h> | |
2525789b | 21 | #include <linux/err.h> |
261f3b49 | 22 | #include <asm/uv/uv_hub.h> |
2525789b DN |
23 | #if defined CONFIG_X86_64 |
24 | #include <asm/uv/bios.h> | |
25 | #include <asm/uv/uv_irq.h> | |
26 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
27 | #include <asm/sn/intr.h> | |
28 | #include <asm/sn/sn_sal.h> | |
29 | #endif | |
5b8669df | 30 | #include "../sgi-gru/gru.h" |
261f3b49 | 31 | #include "../sgi-gru/grukservices.h" |
94bd2708 DN |
32 | #include "xpc.h" |
33 | ||
6f2584f4 JS |
34 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
35 | struct uv_IO_APIC_route_entry { | |
36 | __u64 vector : 8, | |
37 | delivery_mode : 3, | |
38 | dest_mode : 1, | |
39 | delivery_status : 1, | |
40 | polarity : 1, | |
41 | __reserved_1 : 1, | |
42 | trigger : 1, | |
43 | mask : 1, | |
44 | __reserved_2 : 15, | |
45 | dest : 32; | |
46 | }; | |
47 | #endif | |
48 | ||
a374c57b | 49 | static struct xpc_heartbeat_uv *xpc_heartbeat_uv; |
33ba3c77 | 50 | |
5b8669df | 51 | #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) |
2525789b DN |
52 | #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ |
53 | XPC_ACTIVATE_MSG_SIZE_UV) | |
54 | #define XPC_ACTIVATE_IRQ_NAME "xpc_activate" | |
5b8669df | 55 | |
2525789b DN |
56 | #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) |
57 | #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ | |
58 | XPC_NOTIFY_MSG_SIZE_UV) | |
59 | #define XPC_NOTIFY_IRQ_NAME "xpc_notify" | |
5b8669df | 60 | |
2525789b DN |
61 | static struct xpc_gru_mq_uv *xpc_activate_mq_uv; |
62 | static struct xpc_gru_mq_uv *xpc_notify_mq_uv; | |
5b8669df DN |
63 | |
64 | static int | |
a7665b0a | 65 | xpc_setup_partitions_uv(void) |
5b8669df DN |
66 | { |
67 | short partid; | |
68 | struct xpc_partition_uv *part_uv; | |
69 | ||
70 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
71 | part_uv = &xpc_partitions[partid].sn.uv; | |
72 | ||
6f2584f4 | 73 | mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex); |
5b8669df DN |
74 | spin_lock_init(&part_uv->flags_lock); |
75 | part_uv->remote_act_state = XPC_P_AS_INACTIVE; | |
76 | } | |
77 | return 0; | |
78 | } | |
79 | ||
6f2584f4 | 80 | static void |
a7665b0a | 81 | xpc_teardown_partitions_uv(void) |
6f2584f4 JS |
82 | { |
83 | short partid; | |
84 | struct xpc_partition_uv *part_uv; | |
85 | unsigned long irq_flags; | |
86 | ||
87 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
88 | part_uv = &xpc_partitions[partid].sn.uv; | |
89 | ||
90 | if (part_uv->cached_activate_gru_mq_desc != NULL) { | |
91 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
92 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
93 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
94 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
95 | kfree(part_uv->cached_activate_gru_mq_desc); | |
96 | part_uv->cached_activate_gru_mq_desc = NULL; | |
97 | mutex_unlock(&part_uv-> | |
98 | cached_activate_gru_mq_desc_mutex); | |
99 | } | |
100 | } | |
101 | } | |
102 | ||
2525789b DN |
103 | static int |
104 | xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) | |
105 | { | |
6f2584f4 JS |
106 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
107 | ||
2525789b DN |
108 | #if defined CONFIG_X86_64 |
109 | mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset); | |
110 | if (mq->irq < 0) { | |
111 | dev_err(xpc_part, "uv_setup_irq() returned error=%d\n", | |
6f2584f4 JS |
112 | -mq->irq); |
113 | return mq->irq; | |
2525789b DN |
114 | } |
115 | ||
6f2584f4 | 116 | mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset); |
2525789b | 117 | |
6f2584f4 | 118 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
2525789b DN |
119 | if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0) |
120 | mq->irq = SGI_XPC_ACTIVATE; | |
121 | else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0) | |
122 | mq->irq = SGI_XPC_NOTIFY; | |
123 | else | |
124 | return -EINVAL; | |
125 | ||
6f2584f4 JS |
126 | mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; |
127 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value); | |
2525789b DN |
128 | #else |
129 | #error not a supported configuration | |
130 | #endif | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static void | |
136 | xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq) | |
137 | { | |
138 | #if defined CONFIG_X86_64 | |
139 | uv_teardown_irq(mq->irq, mq->mmr_blade, mq->mmr_offset); | |
140 | ||
141 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
142 | int mmr_pnode; | |
143 | unsigned long mmr_value; | |
144 | ||
145 | mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); | |
146 | mmr_value = 1UL << 16; | |
147 | ||
148 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); | |
149 | #else | |
150 | #error not a supported configuration | |
151 | #endif | |
152 | } | |
153 | ||
154 | static int | |
155 | xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) | |
156 | { | |
157 | int ret; | |
158 | ||
159 | #if defined CONFIG_X86_64 | |
c8182f00 RA |
160 | ret = uv_bios_mq_watchlist_alloc(mq->mmr_blade, uv_gpa(mq->address), |
161 | mq->order, &mq->mmr_offset); | |
2525789b DN |
162 | if (ret < 0) { |
163 | dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, " | |
164 | "ret=%d\n", ret); | |
165 | return ret; | |
166 | } | |
167 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
6f2584f4 | 168 | ret = sn_mq_watchlist_alloc(mq->mmr_blade, (void *)uv_gpa(mq->address), |
c8182f00 | 169 | mq->order, &mq->mmr_offset); |
2525789b DN |
170 | if (ret < 0) { |
171 | dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n", | |
172 | ret); | |
173 | return -EBUSY; | |
174 | } | |
175 | #else | |
176 | #error not a supported configuration | |
177 | #endif | |
178 | ||
179 | mq->watchlist_num = ret; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static void | |
184 | xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq) | |
185 | { | |
186 | int ret; | |
187 | ||
188 | #if defined CONFIG_X86_64 | |
189 | ret = uv_bios_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num); | |
190 | BUG_ON(ret != BIOS_STATUS_SUCCESS); | |
191 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
192 | ret = sn_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num); | |
193 | BUG_ON(ret != SALRET_OK); | |
194 | #else | |
195 | #error not a supported configuration | |
196 | #endif | |
197 | } | |
198 | ||
199 | static struct xpc_gru_mq_uv * | |
200 | xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, | |
5b8669df DN |
201 | irq_handler_t irq_handler) |
202 | { | |
2525789b | 203 | enum xp_retval xp_ret; |
5b8669df DN |
204 | int ret; |
205 | int nid; | |
2525789b | 206 | int pg_order; |
5b8669df | 207 | struct page *page; |
2525789b | 208 | struct xpc_gru_mq_uv *mq; |
6f2584f4 | 209 | struct uv_IO_APIC_route_entry *mmr_value; |
2525789b DN |
210 | |
211 | mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL); | |
212 | if (mq == NULL) { | |
213 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
214 | "a xpc_gru_mq_uv structure\n"); | |
215 | ret = -ENOMEM; | |
6f2584f4 JS |
216 | goto out_0; |
217 | } | |
218 | ||
219 | mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc), | |
220 | GFP_KERNEL); | |
221 | if (mq->gru_mq_desc == NULL) { | |
222 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " | |
223 | "a gru_message_queue_desc structure\n"); | |
224 | ret = -ENOMEM; | |
2525789b DN |
225 | goto out_1; |
226 | } | |
5b8669df | 227 | |
2525789b DN |
228 | pg_order = get_order(mq_size); |
229 | mq->order = pg_order + PAGE_SHIFT; | |
230 | mq_size = 1UL << mq->order; | |
231 | ||
232 | mq->mmr_blade = uv_cpu_to_blade_id(cpu); | |
233 | ||
234 | nid = cpu_to_node(cpu); | |
6484eb3e | 235 | page = alloc_pages_exact_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE, |
2525789b | 236 | pg_order); |
bd3e64c1 DN |
237 | if (page == NULL) { |
238 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d " | |
239 | "bytes of memory on nid=%d for GRU mq\n", mq_size, nid); | |
2525789b DN |
240 | ret = -ENOMEM; |
241 | goto out_2; | |
bd3e64c1 | 242 | } |
2525789b | 243 | mq->address = page_address(page); |
5b8669df | 244 | |
2525789b DN |
245 | /* enable generation of irq when GRU mq operation occurs to this mq */ |
246 | ret = xpc_gru_mq_watchlist_alloc_uv(mq); | |
247 | if (ret != 0) | |
248 | goto out_3; | |
5b8669df | 249 | |
2525789b DN |
250 | ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name); |
251 | if (ret != 0) | |
252 | goto out_4; | |
253 | ||
254 | ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL); | |
5b8669df DN |
255 | if (ret != 0) { |
256 | dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n", | |
6f2584f4 | 257 | mq->irq, -ret); |
2525789b | 258 | goto out_5; |
5b8669df DN |
259 | } |
260 | ||
6f2584f4 JS |
261 | mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value; |
262 | ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size, | |
263 | nid, mmr_value->vector, mmr_value->dest); | |
264 | if (ret != 0) { | |
265 | dev_err(xpc_part, "gru_create_message_queue() returned " | |
266 | "error=%d\n", ret); | |
267 | ret = -EINVAL; | |
268 | goto out_6; | |
269 | } | |
270 | ||
2525789b DN |
271 | /* allow other partitions to access this GRU mq */ |
272 | xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size); | |
273 | if (xp_ret != xpSuccess) { | |
274 | ret = -EACCES; | |
275 | goto out_6; | |
276 | } | |
5b8669df DN |
277 | |
278 | return mq; | |
2525789b DN |
279 | |
280 | /* something went wrong */ | |
281 | out_6: | |
282 | free_irq(mq->irq, NULL); | |
283 | out_5: | |
284 | xpc_release_gru_mq_irq_uv(mq); | |
285 | out_4: | |
286 | xpc_gru_mq_watchlist_free_uv(mq); | |
287 | out_3: | |
288 | free_pages((unsigned long)mq->address, pg_order); | |
289 | out_2: | |
6f2584f4 | 290 | kfree(mq->gru_mq_desc); |
2525789b | 291 | out_1: |
6f2584f4 JS |
292 | kfree(mq); |
293 | out_0: | |
2525789b | 294 | return ERR_PTR(ret); |
5b8669df | 295 | } |
94bd2708 | 296 | |
33ba3c77 | 297 | static void |
2525789b | 298 | xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) |
5b8669df | 299 | { |
2525789b DN |
300 | unsigned int mq_size; |
301 | int pg_order; | |
302 | int ret; | |
303 | ||
304 | /* disallow other partitions to access GRU mq */ | |
305 | mq_size = 1UL << mq->order; | |
306 | ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size); | |
307 | BUG_ON(ret != xpSuccess); | |
308 | ||
309 | /* unregister irq handler and release mq irq/vector mapping */ | |
310 | free_irq(mq->irq, NULL); | |
311 | xpc_release_gru_mq_irq_uv(mq); | |
5b8669df | 312 | |
2525789b DN |
313 | /* disable generation of irq when GRU mq op occurs to this mq */ |
314 | xpc_gru_mq_watchlist_free_uv(mq); | |
5b8669df | 315 | |
2525789b DN |
316 | pg_order = mq->order - PAGE_SHIFT; |
317 | free_pages((unsigned long)mq->address, pg_order); | |
5b8669df | 318 | |
2525789b | 319 | kfree(mq); |
5b8669df DN |
320 | } |
321 | ||
322 | static enum xp_retval | |
6f2584f4 JS |
323 | xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg, |
324 | size_t msg_size) | |
33ba3c77 | 325 | { |
5b8669df DN |
326 | enum xp_retval xp_ret; |
327 | int ret; | |
328 | ||
329 | while (1) { | |
6f2584f4 | 330 | ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size); |
5b8669df DN |
331 | if (ret == MQE_OK) { |
332 | xp_ret = xpSuccess; | |
333 | break; | |
334 | } | |
335 | ||
336 | if (ret == MQE_QUEUE_FULL) { | |
337 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
338 | "error=MQE_QUEUE_FULL\n"); | |
339 | /* !!! handle QLimit reached; delay & try again */ | |
340 | /* ??? Do we add a limit to the number of retries? */ | |
341 | (void)msleep_interruptible(10); | |
342 | } else if (ret == MQE_CONGESTION) { | |
343 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " | |
344 | "error=MQE_CONGESTION\n"); | |
345 | /* !!! handle LB Overflow; simply try again */ | |
346 | /* ??? Do we add a limit to the number of retries? */ | |
347 | } else { | |
348 | /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */ | |
349 | dev_err(xpc_chan, "gru_send_message_gpa() returned " | |
350 | "error=%d\n", ret); | |
351 | xp_ret = xpGruSendMqError; | |
352 | break; | |
353 | } | |
354 | } | |
355 | return xp_ret; | |
356 | } | |
357 | ||
358 | static void | |
359 | xpc_process_activate_IRQ_rcvd_uv(void) | |
360 | { | |
361 | unsigned long irq_flags; | |
362 | short partid; | |
363 | struct xpc_partition *part; | |
364 | u8 act_state_req; | |
365 | ||
366 | DBUG_ON(xpc_activate_IRQ_rcvd == 0); | |
367 | ||
368 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
369 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
370 | part = &xpc_partitions[partid]; | |
371 | ||
372 | if (part->sn.uv.act_state_req == 0) | |
373 | continue; | |
374 | ||
375 | xpc_activate_IRQ_rcvd--; | |
376 | BUG_ON(xpc_activate_IRQ_rcvd < 0); | |
377 | ||
378 | act_state_req = part->sn.uv.act_state_req; | |
379 | part->sn.uv.act_state_req = 0; | |
380 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
381 | ||
382 | if (act_state_req == XPC_P_ASR_ACTIVATE_UV) { | |
383 | if (part->act_state == XPC_P_AS_INACTIVE) | |
384 | xpc_activate_partition(part); | |
385 | else if (part->act_state == XPC_P_AS_DEACTIVATING) | |
386 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
387 | ||
388 | } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) { | |
389 | if (part->act_state == XPC_P_AS_INACTIVE) | |
390 | xpc_activate_partition(part); | |
391 | else | |
392 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); | |
393 | ||
394 | } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) { | |
395 | XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason); | |
396 | ||
397 | } else { | |
398 | BUG(); | |
399 | } | |
400 | ||
401 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
402 | if (xpc_activate_IRQ_rcvd == 0) | |
403 | break; | |
404 | } | |
405 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
406 | ||
407 | } | |
408 | ||
bd3e64c1 DN |
409 | static void |
410 | xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, | |
411 | struct xpc_activate_mq_msghdr_uv *msg_hdr, | |
412 | int *wakeup_hb_checker) | |
5b8669df DN |
413 | { |
414 | unsigned long irq_flags; | |
bd3e64c1 | 415 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
5b8669df | 416 | struct xpc_openclose_args *args; |
5b8669df | 417 | |
bd3e64c1 | 418 | part_uv->remote_act_state = msg_hdr->act_state; |
5b8669df | 419 | |
bd3e64c1 DN |
420 | switch (msg_hdr->type) { |
421 | case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV: | |
422 | /* syncing of remote_act_state was just done above */ | |
423 | break; | |
5b8669df | 424 | |
bd3e64c1 DN |
425 | case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: { |
426 | struct xpc_activate_mq_msg_activate_req_uv *msg; | |
5b8669df | 427 | |
bd3e64c1 DN |
428 | /* |
429 | * ??? Do we deal here with ts_jiffies being different | |
430 | * ??? if act_state != XPC_P_AS_INACTIVE instead of | |
431 | * ??? below? | |
432 | */ | |
433 | msg = container_of(msg_hdr, struct | |
434 | xpc_activate_mq_msg_activate_req_uv, hdr); | |
5b8669df | 435 | |
bd3e64c1 DN |
436 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
437 | if (part_uv->act_state_req == 0) | |
438 | xpc_activate_IRQ_rcvd++; | |
439 | part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV; | |
440 | part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */ | |
441 | part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies; | |
a374c57b | 442 | part_uv->heartbeat_gpa = msg->heartbeat_gpa; |
6f2584f4 JS |
443 | |
444 | if (msg->activate_gru_mq_desc_gpa != | |
445 | part_uv->activate_gru_mq_desc_gpa) { | |
446 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
447 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
448 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
449 | part_uv->activate_gru_mq_desc_gpa = | |
450 | msg->activate_gru_mq_desc_gpa; | |
451 | } | |
bd3e64c1 | 452 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
5b8669df | 453 | |
bd3e64c1 DN |
454 | (*wakeup_hb_checker)++; |
455 | break; | |
456 | } | |
457 | case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: { | |
458 | struct xpc_activate_mq_msg_deactivate_req_uv *msg; | |
5b8669df | 459 | |
bd3e64c1 DN |
460 | msg = container_of(msg_hdr, struct |
461 | xpc_activate_mq_msg_deactivate_req_uv, hdr); | |
5b8669df | 462 | |
bd3e64c1 DN |
463 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
464 | if (part_uv->act_state_req == 0) | |
465 | xpc_activate_IRQ_rcvd++; | |
466 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
467 | part_uv->reason = msg->reason; | |
468 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
469 | ||
470 | (*wakeup_hb_checker)++; | |
471 | return; | |
472 | } | |
473 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: { | |
474 | struct xpc_activate_mq_msg_chctl_closerequest_uv *msg; | |
5b8669df | 475 | |
bd3e64c1 DN |
476 | msg = container_of(msg_hdr, struct |
477 | xpc_activate_mq_msg_chctl_closerequest_uv, | |
478 | hdr); | |
479 | args = &part->remote_openclose_args[msg->ch_number]; | |
480 | args->reason = msg->reason; | |
5b8669df | 481 | |
bd3e64c1 DN |
482 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
483 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST; | |
484 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 485 | |
bd3e64c1 DN |
486 | xpc_wakeup_channel_mgr(part); |
487 | break; | |
488 | } | |
489 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: { | |
490 | struct xpc_activate_mq_msg_chctl_closereply_uv *msg; | |
5b8669df | 491 | |
bd3e64c1 DN |
492 | msg = container_of(msg_hdr, struct |
493 | xpc_activate_mq_msg_chctl_closereply_uv, | |
494 | hdr); | |
5b8669df | 495 | |
bd3e64c1 DN |
496 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
497 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY; | |
498 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
5b8669df | 499 | |
bd3e64c1 DN |
500 | xpc_wakeup_channel_mgr(part); |
501 | break; | |
502 | } | |
503 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: { | |
504 | struct xpc_activate_mq_msg_chctl_openrequest_uv *msg; | |
505 | ||
506 | msg = container_of(msg_hdr, struct | |
507 | xpc_activate_mq_msg_chctl_openrequest_uv, | |
508 | hdr); | |
509 | args = &part->remote_openclose_args[msg->ch_number]; | |
510 | args->entry_size = msg->entry_size; | |
511 | args->local_nentries = msg->local_nentries; | |
512 | ||
513 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
514 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST; | |
515 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
516 | ||
517 | xpc_wakeup_channel_mgr(part); | |
518 | break; | |
519 | } | |
520 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: { | |
521 | struct xpc_activate_mq_msg_chctl_openreply_uv *msg; | |
522 | ||
523 | msg = container_of(msg_hdr, struct | |
524 | xpc_activate_mq_msg_chctl_openreply_uv, hdr); | |
525 | args = &part->remote_openclose_args[msg->ch_number]; | |
526 | args->remote_nentries = msg->remote_nentries; | |
527 | args->local_nentries = msg->local_nentries; | |
6f2584f4 | 528 | args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa; |
bd3e64c1 DN |
529 | |
530 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
531 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY; | |
532 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
533 | ||
534 | xpc_wakeup_channel_mgr(part); | |
535 | break; | |
536 | } | |
efdd06ed RH |
537 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: { |
538 | struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg; | |
539 | ||
540 | msg = container_of(msg_hdr, struct | |
541 | xpc_activate_mq_msg_chctl_opencomplete_uv, hdr); | |
542 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
543 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE; | |
544 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
545 | ||
546 | xpc_wakeup_channel_mgr(part); | |
547 | } | |
bd3e64c1 DN |
548 | case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: |
549 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
550 | part_uv->flags |= XPC_P_ENGAGED_UV; | |
551 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
552 | break; | |
553 | ||
554 | case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV: | |
555 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
556 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
557 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
558 | break; | |
559 | ||
560 | default: | |
561 | dev_err(xpc_part, "received unknown activate_mq msg type=%d " | |
562 | "from partition=%d\n", msg_hdr->type, XPC_PARTID(part)); | |
563 | ||
564 | /* get hb checker to deactivate from the remote partition */ | |
565 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
566 | if (part_uv->act_state_req == 0) | |
567 | xpc_activate_IRQ_rcvd++; | |
568 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
569 | part_uv->reason = xpBadMsgType; | |
570 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 571 | |
bd3e64c1 DN |
572 | (*wakeup_hb_checker)++; |
573 | return; | |
574 | } | |
5b8669df | 575 | |
bd3e64c1 DN |
576 | if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies && |
577 | part->remote_rp_ts_jiffies != 0) { | |
578 | /* | |
579 | * ??? Does what we do here need to be sensitive to | |
580 | * ??? act_state or remote_act_state? | |
581 | */ | |
582 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
583 | if (part_uv->act_state_req == 0) | |
584 | xpc_activate_IRQ_rcvd++; | |
585 | part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV; | |
586 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
5b8669df | 587 | |
bd3e64c1 DN |
588 | (*wakeup_hb_checker)++; |
589 | } | |
590 | } | |
591 | ||
592 | static irqreturn_t | |
593 | xpc_handle_activate_IRQ_uv(int irq, void *dev_id) | |
594 | { | |
595 | struct xpc_activate_mq_msghdr_uv *msg_hdr; | |
596 | short partid; | |
597 | struct xpc_partition *part; | |
598 | int wakeup_hb_checker = 0; | |
6f2584f4 | 599 | int part_referenced; |
bd3e64c1 | 600 | |
2525789b | 601 | while (1) { |
6f2584f4 | 602 | msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc); |
2525789b DN |
603 | if (msg_hdr == NULL) |
604 | break; | |
bd3e64c1 DN |
605 | |
606 | partid = msg_hdr->partid; | |
607 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
608 | dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() " | |
609 | "received invalid partid=0x%x in message\n", | |
610 | partid); | |
611 | } else { | |
612 | part = &xpc_partitions[partid]; | |
6f2584f4 JS |
613 | |
614 | part_referenced = xpc_part_ref(part); | |
615 | xpc_handle_activate_mq_msg_uv(part, msg_hdr, | |
616 | &wakeup_hb_checker); | |
617 | if (part_referenced) | |
bd3e64c1 | 618 | xpc_part_deref(part); |
5b8669df DN |
619 | } |
620 | ||
6f2584f4 | 621 | gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr); |
5b8669df DN |
622 | } |
623 | ||
624 | if (wakeup_hb_checker) | |
625 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
626 | ||
627 | return IRQ_HANDLED; | |
628 | } | |
629 | ||
6f2584f4 JS |
630 | static enum xp_retval |
631 | xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc, | |
632 | unsigned long gru_mq_desc_gpa) | |
633 | { | |
634 | enum xp_retval ret; | |
635 | ||
636 | ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa, | |
637 | sizeof(struct gru_message_queue_desc)); | |
638 | if (ret == xpSuccess) | |
639 | gru_mq_desc->mq = NULL; | |
640 | ||
641 | return ret; | |
642 | } | |
643 | ||
5b8669df DN |
644 | static enum xp_retval |
645 | xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size, | |
646 | int msg_type) | |
647 | { | |
648 | struct xpc_activate_mq_msghdr_uv *msg_hdr = msg; | |
6f2584f4 JS |
649 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
650 | struct gru_message_queue_desc *gru_mq_desc; | |
651 | unsigned long irq_flags; | |
652 | enum xp_retval ret; | |
5b8669df DN |
653 | |
654 | DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV); | |
655 | ||
656 | msg_hdr->type = msg_type; | |
6f2584f4 | 657 | msg_hdr->partid = xp_partition_id; |
5b8669df DN |
658 | msg_hdr->act_state = part->act_state; |
659 | msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies; | |
660 | ||
6f2584f4 JS |
661 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); |
662 | again: | |
663 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) { | |
664 | gru_mq_desc = part_uv->cached_activate_gru_mq_desc; | |
665 | if (gru_mq_desc == NULL) { | |
666 | gru_mq_desc = kmalloc(sizeof(struct | |
667 | gru_message_queue_desc), | |
668 | GFP_KERNEL); | |
669 | if (gru_mq_desc == NULL) { | |
670 | ret = xpNoMemory; | |
671 | goto done; | |
672 | } | |
673 | part_uv->cached_activate_gru_mq_desc = gru_mq_desc; | |
674 | } | |
675 | ||
676 | ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc, | |
677 | part_uv-> | |
678 | activate_gru_mq_desc_gpa); | |
679 | if (ret != xpSuccess) | |
680 | goto done; | |
681 | ||
682 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
683 | part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; | |
684 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
685 | } | |
686 | ||
5b8669df | 687 | /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */ |
6f2584f4 JS |
688 | ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg, |
689 | msg_size); | |
690 | if (ret != xpSuccess) { | |
691 | smp_rmb(); /* ensure a fresh copy of part_uv->flags */ | |
692 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) | |
693 | goto again; | |
694 | } | |
695 | done: | |
696 | mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex); | |
697 | return ret; | |
5b8669df DN |
698 | } |
699 | ||
700 | static void | |
701 | xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg, | |
702 | size_t msg_size, int msg_type) | |
703 | { | |
704 | enum xp_retval ret; | |
705 | ||
706 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
707 | if (unlikely(ret != xpSuccess)) | |
708 | XPC_DEACTIVATE_PARTITION(part, ret); | |
709 | } | |
710 | ||
711 | static void | |
712 | xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags, | |
713 | void *msg, size_t msg_size, int msg_type) | |
714 | { | |
6f2584f4 | 715 | struct xpc_partition *part = &xpc_partitions[ch->partid]; |
5b8669df DN |
716 | enum xp_retval ret; |
717 | ||
718 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); | |
719 | if (unlikely(ret != xpSuccess)) { | |
720 | if (irq_flags != NULL) | |
721 | spin_unlock_irqrestore(&ch->lock, *irq_flags); | |
722 | ||
723 | XPC_DEACTIVATE_PARTITION(part, ret); | |
724 | ||
725 | if (irq_flags != NULL) | |
726 | spin_lock_irqsave(&ch->lock, *irq_flags); | |
727 | } | |
728 | } | |
729 | ||
730 | static void | |
731 | xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req) | |
732 | { | |
733 | unsigned long irq_flags; | |
734 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
735 | ||
33ba3c77 | 736 | /* |
7d9d1f25 | 737 | * !!! Make our side think that the remote partition sent an activate |
a374c57b | 738 | * !!! mq message our way by doing what the activate IRQ handler would |
ea57f80c | 739 | * !!! do had one really been sent. |
33ba3c77 | 740 | */ |
5b8669df DN |
741 | |
742 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
743 | if (part_uv->act_state_req == 0) | |
744 | xpc_activate_IRQ_rcvd++; | |
745 | part_uv->act_state_req = act_state_req; | |
746 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
747 | ||
748 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
33ba3c77 DN |
749 | } |
750 | ||
94bd2708 | 751 | static enum xp_retval |
5b8669df DN |
752 | xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, |
753 | size_t *len) | |
94bd2708 | 754 | { |
7d9d1f25 DN |
755 | s64 status; |
756 | enum xp_retval ret; | |
757 | ||
758 | #if defined CONFIG_X86_64 | |
759 | status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa, | |
760 | (u64 *)len); | |
761 | if (status == BIOS_STATUS_SUCCESS) | |
762 | ret = xpSuccess; | |
763 | else if (status == BIOS_STATUS_MORE_PASSES) | |
764 | ret = xpNeedMoreInfo; | |
765 | else | |
766 | ret = xpBiosError; | |
767 | ||
768 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV | |
769 | status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len); | |
770 | if (status == SALRET_OK) | |
771 | ret = xpSuccess; | |
772 | else if (status == SALRET_MORE_PASSES) | |
773 | ret = xpNeedMoreInfo; | |
774 | else | |
775 | ret = xpSalError; | |
776 | ||
777 | #else | |
778 | #error not a supported configuration | |
779 | #endif | |
780 | ||
781 | return ret; | |
5b8669df DN |
782 | } |
783 | ||
784 | static int | |
a7665b0a | 785 | xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp) |
5b8669df | 786 | { |
a374c57b RH |
787 | xpc_heartbeat_uv = |
788 | &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat; | |
789 | rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv); | |
790 | rp->sn.uv.activate_gru_mq_desc_gpa = | |
6f2584f4 | 791 | uv_gpa(xpc_activate_mq_uv->gru_mq_desc); |
5b8669df DN |
792 | return 0; |
793 | } | |
794 | ||
795 | static void | |
a374c57b | 796 | xpc_allow_hb_uv(short partid) |
5b8669df | 797 | { |
a374c57b | 798 | } |
5b8669df | 799 | |
a374c57b RH |
800 | static void |
801 | xpc_disallow_hb_uv(short partid) | |
802 | { | |
803 | } | |
5b8669df | 804 | |
a374c57b RH |
805 | static void |
806 | xpc_disallow_all_hbs_uv(void) | |
807 | { | |
94bd2708 DN |
808 | } |
809 | ||
33ba3c77 DN |
810 | static void |
811 | xpc_increment_heartbeat_uv(void) | |
812 | { | |
a374c57b | 813 | xpc_heartbeat_uv->value++; |
5b8669df DN |
814 | } |
815 | ||
816 | static void | |
817 | xpc_offline_heartbeat_uv(void) | |
818 | { | |
a374c57b RH |
819 | xpc_increment_heartbeat_uv(); |
820 | xpc_heartbeat_uv->offline = 1; | |
5b8669df DN |
821 | } |
822 | ||
823 | static void | |
824 | xpc_online_heartbeat_uv(void) | |
825 | { | |
a374c57b RH |
826 | xpc_increment_heartbeat_uv(); |
827 | xpc_heartbeat_uv->offline = 0; | |
33ba3c77 DN |
828 | } |
829 | ||
830 | static void | |
831 | xpc_heartbeat_init_uv(void) | |
832 | { | |
a374c57b RH |
833 | xpc_heartbeat_uv->value = 1; |
834 | xpc_heartbeat_uv->offline = 0; | |
33ba3c77 DN |
835 | } |
836 | ||
837 | static void | |
838 | xpc_heartbeat_exit_uv(void) | |
839 | { | |
a374c57b | 840 | xpc_offline_heartbeat_uv(); |
5b8669df DN |
841 | } |
842 | ||
843 | static enum xp_retval | |
844 | xpc_get_remote_heartbeat_uv(struct xpc_partition *part) | |
845 | { | |
846 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
a374c57b | 847 | enum xp_retval ret; |
5b8669df | 848 | |
a374c57b RH |
849 | ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat), |
850 | part_uv->heartbeat_gpa, | |
851 | sizeof(struct xpc_heartbeat_uv)); | |
852 | if (ret != xpSuccess) | |
853 | return ret; | |
5b8669df | 854 | |
a374c57b RH |
855 | if (part_uv->cached_heartbeat.value == part->last_heartbeat && |
856 | !part_uv->cached_heartbeat.offline) { | |
5b8669df | 857 | |
a374c57b RH |
858 | ret = xpNoHeartbeat; |
859 | } else { | |
860 | part->last_heartbeat = part_uv->cached_heartbeat.value; | |
5b8669df DN |
861 | } |
862 | return ret; | |
33ba3c77 DN |
863 | } |
864 | ||
865 | static void | |
a47d5dac | 866 | xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, |
5b8669df | 867 | unsigned long remote_rp_gpa, int nasid) |
33ba3c77 DN |
868 | { |
869 | short partid = remote_rp->SAL_partid; | |
870 | struct xpc_partition *part = &xpc_partitions[partid]; | |
5b8669df | 871 | struct xpc_activate_mq_msg_activate_req_uv msg; |
33ba3c77 | 872 | |
5b8669df DN |
873 | part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ |
874 | part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; | |
a374c57b | 875 | part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa; |
6f2584f4 | 876 | part->sn.uv.activate_gru_mq_desc_gpa = |
a374c57b | 877 | remote_rp->sn.uv.activate_gru_mq_desc_gpa; |
5b8669df DN |
878 | |
879 | /* | |
880 | * ??? Is it a good idea to make this conditional on what is | |
881 | * ??? potentially stale state information? | |
882 | */ | |
883 | if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { | |
884 | msg.rp_gpa = uv_gpa(xpc_rsvd_page); | |
a374c57b | 885 | msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa; |
6f2584f4 | 886 | msg.activate_gru_mq_desc_gpa = |
a374c57b | 887 | xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa; |
5b8669df DN |
888 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
889 | XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); | |
890 | } | |
33ba3c77 | 891 | |
5b8669df DN |
892 | if (part->act_state == XPC_P_AS_INACTIVE) |
893 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); | |
33ba3c77 DN |
894 | } |
895 | ||
a47d5dac DN |
896 | static void |
897 | xpc_request_partition_reactivation_uv(struct xpc_partition *part) | |
898 | { | |
5b8669df DN |
899 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); |
900 | } | |
901 | ||
902 | static void | |
903 | xpc_request_partition_deactivation_uv(struct xpc_partition *part) | |
904 | { | |
905 | struct xpc_activate_mq_msg_deactivate_req_uv msg; | |
906 | ||
907 | /* | |
908 | * ??? Is it a good idea to make this conditional on what is | |
909 | * ??? potentially stale state information? | |
910 | */ | |
911 | if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING && | |
912 | part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) { | |
913 | ||
914 | msg.reason = part->reason; | |
915 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
916 | XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV); | |
917 | } | |
a47d5dac DN |
918 | } |
919 | ||
bd3e64c1 DN |
920 | static void |
921 | xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part) | |
922 | { | |
923 | /* nothing needs to be done */ | |
924 | return; | |
925 | } | |
926 | ||
927 | static void | |
928 | xpc_init_fifo_uv(struct xpc_fifo_head_uv *head) | |
929 | { | |
930 | head->first = NULL; | |
931 | head->last = NULL; | |
932 | spin_lock_init(&head->lock); | |
933 | head->n_entries = 0; | |
934 | } | |
935 | ||
936 | static void * | |
937 | xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) | |
938 | { | |
939 | unsigned long irq_flags; | |
940 | struct xpc_fifo_entry_uv *first; | |
941 | ||
942 | spin_lock_irqsave(&head->lock, irq_flags); | |
943 | first = head->first; | |
944 | if (head->first != NULL) { | |
945 | head->first = first->next; | |
946 | if (head->first == NULL) | |
947 | head->last = NULL; | |
948 | } | |
6f2584f4 JS |
949 | head->n_entries--; |
950 | BUG_ON(head->n_entries < 0); | |
bd3e64c1 DN |
951 | spin_unlock_irqrestore(&head->lock, irq_flags); |
952 | first->next = NULL; | |
953 | return first; | |
954 | } | |
955 | ||
956 | static void | |
957 | xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head, | |
958 | struct xpc_fifo_entry_uv *last) | |
959 | { | |
960 | unsigned long irq_flags; | |
961 | ||
962 | last->next = NULL; | |
963 | spin_lock_irqsave(&head->lock, irq_flags); | |
964 | if (head->last != NULL) | |
965 | head->last->next = last; | |
966 | else | |
967 | head->first = last; | |
968 | head->last = last; | |
6f2584f4 | 969 | head->n_entries++; |
bd3e64c1 DN |
970 | spin_unlock_irqrestore(&head->lock, irq_flags); |
971 | } | |
972 | ||
973 | static int | |
974 | xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head) | |
975 | { | |
976 | return head->n_entries; | |
977 | } | |
978 | ||
e17d416b | 979 | /* |
5b8669df | 980 | * Setup the channel structures that are uv specific. |
e17d416b DN |
981 | */ |
982 | static enum xp_retval | |
a7665b0a | 983 | xpc_setup_ch_structures_uv(struct xpc_partition *part) |
e17d416b | 984 | { |
bd3e64c1 DN |
985 | struct xpc_channel_uv *ch_uv; |
986 | int ch_number; | |
987 | ||
988 | for (ch_number = 0; ch_number < part->nchannels; ch_number++) { | |
989 | ch_uv = &part->channels[ch_number].sn.uv; | |
990 | ||
991 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
992 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
993 | } | |
994 | ||
995 | return xpSuccess; | |
e17d416b DN |
996 | } |
997 | ||
998 | /* | |
5b8669df | 999 | * Teardown the channel structures that are uv specific. |
e17d416b DN |
1000 | */ |
1001 | static void | |
a7665b0a | 1002 | xpc_teardown_ch_structures_uv(struct xpc_partition *part) |
e17d416b | 1003 | { |
bd3e64c1 | 1004 | /* nothing needs to be done */ |
e17d416b DN |
1005 | return; |
1006 | } | |
1007 | ||
1008 | static enum xp_retval | |
1009 | xpc_make_first_contact_uv(struct xpc_partition *part) | |
1010 | { | |
5b8669df DN |
1011 | struct xpc_activate_mq_msg_uv msg; |
1012 | ||
1013 | /* | |
1014 | * We send a sync msg to get the remote partition's remote_act_state | |
1015 | * updated to our current act_state which at this point should | |
1016 | * be XPC_P_AS_ACTIVATING. | |
1017 | */ | |
1018 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1019 | XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV); | |
1020 | ||
1021 | while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) { | |
1022 | ||
1023 | dev_dbg(xpc_part, "waiting to make first contact with " | |
1024 | "partition %d\n", XPC_PARTID(part)); | |
1025 | ||
1026 | /* wait a 1/4 of a second or so */ | |
1027 | (void)msleep_interruptible(250); | |
1028 | ||
1029 | if (part->act_state == XPC_P_AS_DEACTIVATING) | |
1030 | return part->reason; | |
1031 | } | |
1032 | ||
1033 | return xpSuccess; | |
e17d416b DN |
1034 | } |
1035 | ||
1036 | static u64 | |
7fb5e59d | 1037 | xpc_get_chctl_all_flags_uv(struct xpc_partition *part) |
e17d416b | 1038 | { |
5b8669df DN |
1039 | unsigned long irq_flags; |
1040 | union xpc_channel_ctl_flags chctl; | |
1041 | ||
1042 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1043 | chctl = part->chctl; | |
1044 | if (chctl.all_flags != 0) | |
1045 | part->chctl.all_flags = 0; | |
1046 | ||
1047 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1048 | return chctl.all_flags; | |
1049 | } | |
1050 | ||
bd3e64c1 DN |
1051 | static enum xp_retval |
1052 | xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch) | |
1053 | { | |
1054 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1055 | struct xpc_send_msg_slot_uv *msg_slot; | |
1056 | unsigned long irq_flags; | |
1057 | int nentries; | |
1058 | int entry; | |
1059 | size_t nbytes; | |
1060 | ||
1061 | for (nentries = ch->local_nentries; nentries > 0; nentries--) { | |
1062 | nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv); | |
1063 | ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1064 | if (ch_uv->send_msg_slots == NULL) | |
1065 | continue; | |
1066 | ||
1067 | for (entry = 0; entry < nentries; entry++) { | |
1068 | msg_slot = &ch_uv->send_msg_slots[entry]; | |
1069 | ||
1070 | msg_slot->msg_slot_number = entry; | |
1071 | xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list, | |
1072 | &msg_slot->next); | |
1073 | } | |
1074 | ||
1075 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1076 | if (nentries < ch->local_nentries) | |
1077 | ch->local_nentries = nentries; | |
1078 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1079 | return xpSuccess; | |
1080 | } | |
1081 | ||
1082 | return xpNoMemory; | |
1083 | } | |
1084 | ||
1085 | static enum xp_retval | |
1086 | xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch) | |
1087 | { | |
1088 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1089 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1090 | unsigned long irq_flags; | |
1091 | int nentries; | |
1092 | int entry; | |
1093 | size_t nbytes; | |
1094 | ||
1095 | for (nentries = ch->remote_nentries; nentries > 0; nentries--) { | |
1096 | nbytes = nentries * ch->entry_size; | |
1097 | ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL); | |
1098 | if (ch_uv->recv_msg_slots == NULL) | |
1099 | continue; | |
1100 | ||
1101 | for (entry = 0; entry < nentries; entry++) { | |
361916a9 DN |
1102 | msg_slot = ch_uv->recv_msg_slots + |
1103 | entry * ch->entry_size; | |
bd3e64c1 DN |
1104 | |
1105 | msg_slot->hdr.msg_slot_number = entry; | |
1106 | } | |
1107 | ||
1108 | spin_lock_irqsave(&ch->lock, irq_flags); | |
1109 | if (nentries < ch->remote_nentries) | |
1110 | ch->remote_nentries = nentries; | |
1111 | spin_unlock_irqrestore(&ch->lock, irq_flags); | |
1112 | return xpSuccess; | |
1113 | } | |
1114 | ||
1115 | return xpNoMemory; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * Allocate msg_slots associated with the channel. | |
1120 | */ | |
5b8669df DN |
1121 | static enum xp_retval |
1122 | xpc_setup_msg_structures_uv(struct xpc_channel *ch) | |
1123 | { | |
bd3e64c1 DN |
1124 | static enum xp_retval ret; |
1125 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1126 | ||
1127 | DBUG_ON(ch->flags & XPC_C_SETUP); | |
1128 | ||
6f2584f4 JS |
1129 | ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct |
1130 | gru_message_queue_desc), | |
1131 | GFP_KERNEL); | |
1132 | if (ch_uv->cached_notify_gru_mq_desc == NULL) | |
1133 | return xpNoMemory; | |
1134 | ||
bd3e64c1 DN |
1135 | ret = xpc_allocate_send_msg_slot_uv(ch); |
1136 | if (ret == xpSuccess) { | |
1137 | ||
1138 | ret = xpc_allocate_recv_msg_slot_uv(ch); | |
1139 | if (ret != xpSuccess) { | |
1140 | kfree(ch_uv->send_msg_slots); | |
1141 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1142 | } | |
1143 | } | |
1144 | return ret; | |
5b8669df DN |
1145 | } |
1146 | ||
bd3e64c1 DN |
1147 | /* |
1148 | * Free up msg_slots and clear other stuff that were setup for the specified | |
1149 | * channel. | |
1150 | */ | |
5b8669df DN |
1151 | static void |
1152 | xpc_teardown_msg_structures_uv(struct xpc_channel *ch) | |
1153 | { | |
1154 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; | |
1155 | ||
bd3e64c1 DN |
1156 | DBUG_ON(!spin_is_locked(&ch->lock)); |
1157 | ||
6f2584f4 JS |
1158 | kfree(ch_uv->cached_notify_gru_mq_desc); |
1159 | ch_uv->cached_notify_gru_mq_desc = NULL; | |
5b8669df | 1160 | |
bd3e64c1 DN |
1161 | if (ch->flags & XPC_C_SETUP) { |
1162 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); | |
1163 | kfree(ch_uv->send_msg_slots); | |
1164 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); | |
1165 | kfree(ch_uv->recv_msg_slots); | |
1166 | } | |
5b8669df DN |
1167 | } |
1168 | ||
1169 | static void | |
1170 | xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1171 | { | |
1172 | struct xpc_activate_mq_msg_chctl_closerequest_uv msg; | |
1173 | ||
1174 | msg.ch_number = ch->number; | |
1175 | msg.reason = ch->reason; | |
1176 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1177 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV); | |
1178 | } | |
1179 | ||
1180 | static void | |
1181 | xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1182 | { | |
1183 | struct xpc_activate_mq_msg_chctl_closereply_uv msg; | |
1184 | ||
1185 | msg.ch_number = ch->number; | |
1186 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1187 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV); | |
1188 | } | |
1189 | ||
1190 | static void | |
1191 | xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1192 | { | |
1193 | struct xpc_activate_mq_msg_chctl_openrequest_uv msg; | |
1194 | ||
1195 | msg.ch_number = ch->number; | |
bd3e64c1 | 1196 | msg.entry_size = ch->entry_size; |
5b8669df DN |
1197 | msg.local_nentries = ch->local_nentries; |
1198 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1199 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV); | |
1200 | } | |
1201 | ||
1202 | static void | |
1203 | xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1204 | { | |
1205 | struct xpc_activate_mq_msg_chctl_openreply_uv msg; | |
1206 | ||
1207 | msg.ch_number = ch->number; | |
1208 | msg.local_nentries = ch->local_nentries; | |
1209 | msg.remote_nentries = ch->remote_nentries; | |
6f2584f4 | 1210 | msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc); |
5b8669df DN |
1211 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
1212 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV); | |
1213 | } | |
1214 | ||
efdd06ed RH |
1215 | static void |
1216 | xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags) | |
1217 | { | |
1218 | struct xpc_activate_mq_msg_chctl_opencomplete_uv msg; | |
1219 | ||
1220 | msg.ch_number = ch->number; | |
1221 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), | |
1222 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV); | |
1223 | } | |
1224 | ||
bd3e64c1 DN |
1225 | static void |
1226 | xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) | |
1227 | { | |
1228 | unsigned long irq_flags; | |
1229 | ||
1230 | spin_lock_irqsave(&part->chctl_lock, irq_flags); | |
1231 | part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST; | |
1232 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); | |
1233 | ||
1234 | xpc_wakeup_channel_mgr(part); | |
1235 | } | |
1236 | ||
6f2584f4 | 1237 | static enum xp_retval |
5b8669df | 1238 | xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, |
6f2584f4 | 1239 | unsigned long gru_mq_desc_gpa) |
5b8669df | 1240 | { |
6f2584f4 JS |
1241 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
1242 | ||
1243 | DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL); | |
1244 | return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc, | |
1245 | gru_mq_desc_gpa); | |
5b8669df DN |
1246 | } |
1247 | ||
1248 | static void | |
1249 | xpc_indicate_partition_engaged_uv(struct xpc_partition *part) | |
1250 | { | |
1251 | struct xpc_activate_mq_msg_uv msg; | |
1252 | ||
1253 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1254 | XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV); | |
1255 | } | |
1256 | ||
1257 | static void | |
1258 | xpc_indicate_partition_disengaged_uv(struct xpc_partition *part) | |
1259 | { | |
1260 | struct xpc_activate_mq_msg_uv msg; | |
1261 | ||
1262 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), | |
1263 | XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV); | |
1264 | } | |
1265 | ||
1266 | static void | |
1267 | xpc_assume_partition_disengaged_uv(short partid) | |
1268 | { | |
1269 | struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv; | |
1270 | unsigned long irq_flags; | |
1271 | ||
1272 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); | |
1273 | part_uv->flags &= ~XPC_P_ENGAGED_UV; | |
1274 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); | |
1275 | } | |
1276 | ||
1277 | static int | |
1278 | xpc_partition_engaged_uv(short partid) | |
1279 | { | |
1280 | return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0; | |
1281 | } | |
1282 | ||
1283 | static int | |
1284 | xpc_any_partition_engaged_uv(void) | |
1285 | { | |
1286 | struct xpc_partition_uv *part_uv; | |
1287 | short partid; | |
1288 | ||
1289 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { | |
1290 | part_uv = &xpc_partitions[partid].sn.uv; | |
1291 | if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0) | |
1292 | return 1; | |
1293 | } | |
1294 | return 0; | |
e17d416b DN |
1295 | } |
1296 | ||
bd3e64c1 DN |
1297 | static enum xp_retval |
1298 | xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags, | |
1299 | struct xpc_send_msg_slot_uv **address_of_msg_slot) | |
1300 | { | |
1301 | enum xp_retval ret; | |
1302 | struct xpc_send_msg_slot_uv *msg_slot; | |
1303 | struct xpc_fifo_entry_uv *entry; | |
1304 | ||
1305 | while (1) { | |
1306 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list); | |
1307 | if (entry != NULL) | |
1308 | break; | |
1309 | ||
1310 | if (flags & XPC_NOWAIT) | |
1311 | return xpNoWait; | |
1312 | ||
1313 | ret = xpc_allocate_msg_wait(ch); | |
1314 | if (ret != xpInterrupted && ret != xpTimeout) | |
1315 | return ret; | |
1316 | } | |
1317 | ||
1318 | msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next); | |
1319 | *address_of_msg_slot = msg_slot; | |
1320 | return xpSuccess; | |
1321 | } | |
1322 | ||
1323 | static void | |
1324 | xpc_free_msg_slot_uv(struct xpc_channel *ch, | |
1325 | struct xpc_send_msg_slot_uv *msg_slot) | |
1326 | { | |
1327 | xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next); | |
1328 | ||
1329 | /* wakeup anyone waiting for a free msg slot */ | |
1330 | if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) | |
1331 | wake_up(&ch->msg_allocate_wq); | |
1332 | } | |
1333 | ||
1334 | static void | |
1335 | xpc_notify_sender_uv(struct xpc_channel *ch, | |
1336 | struct xpc_send_msg_slot_uv *msg_slot, | |
1337 | enum xp_retval reason) | |
1338 | { | |
1339 | xpc_notify_func func = msg_slot->func; | |
1340 | ||
1341 | if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) { | |
1342 | ||
1343 | atomic_dec(&ch->n_to_notify); | |
1344 | ||
1345 | dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p " | |
1346 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1347 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1348 | ||
1349 | func(reason, ch->partid, ch->number, msg_slot->key); | |
1350 | ||
1351 | dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p " | |
1352 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, | |
1353 | msg_slot->msg_slot_number, ch->partid, ch->number); | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | static void | |
1358 | xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch, | |
1359 | struct xpc_notify_mq_msg_uv *msg) | |
1360 | { | |
1361 | struct xpc_send_msg_slot_uv *msg_slot; | |
1362 | int entry = msg->hdr.msg_slot_number % ch->local_nentries; | |
1363 | ||
1364 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1365 | ||
1366 | BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number); | |
1367 | msg_slot->msg_slot_number += ch->local_nentries; | |
1368 | ||
1369 | if (msg_slot->func != NULL) | |
1370 | xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered); | |
1371 | ||
1372 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1373 | } | |
1374 | ||
1375 | static void | |
1376 | xpc_handle_notify_mq_msg_uv(struct xpc_partition *part, | |
1377 | struct xpc_notify_mq_msg_uv *msg) | |
1378 | { | |
1379 | struct xpc_partition_uv *part_uv = &part->sn.uv; | |
1380 | struct xpc_channel *ch; | |
1381 | struct xpc_channel_uv *ch_uv; | |
1382 | struct xpc_notify_mq_msg_uv *msg_slot; | |
1383 | unsigned long irq_flags; | |
1384 | int ch_number = msg->hdr.ch_number; | |
1385 | ||
1386 | if (unlikely(ch_number >= part->nchannels)) { | |
1387 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid " | |
1388 | "channel number=0x%x in message from partid=%d\n", | |
1389 | ch_number, XPC_PARTID(part)); | |
1390 | ||
1391 | /* get hb checker to deactivate from the remote partition */ | |
1392 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1393 | if (part_uv->act_state_req == 0) | |
1394 | xpc_activate_IRQ_rcvd++; | |
1395 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; | |
1396 | part_uv->reason = xpBadChannelNumber; | |
1397 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); | |
1398 | ||
1399 | wake_up_interruptible(&xpc_activate_IRQ_wq); | |
1400 | return; | |
1401 | } | |
1402 | ||
1403 | ch = &part->channels[ch_number]; | |
1404 | xpc_msgqueue_ref(ch); | |
1405 | ||
1406 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1407 | xpc_msgqueue_deref(ch); | |
1408 | return; | |
1409 | } | |
1410 | ||
1411 | /* see if we're really dealing with an ACK for a previously sent msg */ | |
1412 | if (msg->hdr.size == 0) { | |
1413 | xpc_handle_notify_mq_ack_uv(ch, msg); | |
1414 | xpc_msgqueue_deref(ch); | |
1415 | return; | |
1416 | } | |
1417 | ||
1418 | /* we're dealing with a normal message sent via the notify_mq */ | |
1419 | ch_uv = &ch->sn.uv; | |
1420 | ||
361916a9 DN |
1421 | msg_slot = ch_uv->recv_msg_slots + |
1422 | (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size; | |
bd3e64c1 DN |
1423 | |
1424 | BUG_ON(msg->hdr.msg_slot_number != msg_slot->hdr.msg_slot_number); | |
1425 | BUG_ON(msg_slot->hdr.size != 0); | |
1426 | ||
1427 | memcpy(msg_slot, msg, msg->hdr.size); | |
1428 | ||
1429 | xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next); | |
1430 | ||
1431 | if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) { | |
1432 | /* | |
1433 | * If there is an existing idle kthread get it to deliver | |
1434 | * the payload, otherwise we'll have to get the channel mgr | |
1435 | * for this partition to create a kthread to do the delivery. | |
1436 | */ | |
1437 | if (atomic_read(&ch->kthreads_idle) > 0) | |
1438 | wake_up_nr(&ch->idle_wq, 1); | |
1439 | else | |
1440 | xpc_send_chctl_local_msgrequest_uv(part, ch->number); | |
1441 | } | |
1442 | xpc_msgqueue_deref(ch); | |
1443 | } | |
1444 | ||
1445 | static irqreturn_t | |
1446 | xpc_handle_notify_IRQ_uv(int irq, void *dev_id) | |
1447 | { | |
1448 | struct xpc_notify_mq_msg_uv *msg; | |
1449 | short partid; | |
1450 | struct xpc_partition *part; | |
1451 | ||
6f2584f4 JS |
1452 | while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) != |
1453 | NULL) { | |
bd3e64c1 DN |
1454 | |
1455 | partid = msg->hdr.partid; | |
1456 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { | |
1457 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received " | |
1458 | "invalid partid=0x%x in message\n", partid); | |
1459 | } else { | |
1460 | part = &xpc_partitions[partid]; | |
1461 | ||
1462 | if (xpc_part_ref(part)) { | |
1463 | xpc_handle_notify_mq_msg_uv(part, msg); | |
1464 | xpc_part_deref(part); | |
1465 | } | |
1466 | } | |
1467 | ||
6f2584f4 | 1468 | gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg); |
bd3e64c1 DN |
1469 | } |
1470 | ||
1471 | return IRQ_HANDLED; | |
1472 | } | |
1473 | ||
1474 | static int | |
1475 | xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch) | |
1476 | { | |
1477 | return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list); | |
1478 | } | |
1479 | ||
1480 | static void | |
1481 | xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number) | |
1482 | { | |
1483 | struct xpc_channel *ch = &part->channels[ch_number]; | |
1484 | int ndeliverable_payloads; | |
1485 | ||
1486 | xpc_msgqueue_ref(ch); | |
1487 | ||
1488 | ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch); | |
1489 | ||
1490 | if (ndeliverable_payloads > 0 && | |
1491 | (ch->flags & XPC_C_CONNECTED) && | |
1492 | (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) { | |
1493 | ||
1494 | xpc_activate_kthreads(ch, ndeliverable_payloads); | |
1495 | } | |
1496 | ||
1497 | xpc_msgqueue_deref(ch); | |
1498 | } | |
1499 | ||
1500 | static enum xp_retval | |
1501 | xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, | |
1502 | u16 payload_size, u8 notify_type, xpc_notify_func func, | |
1503 | void *key) | |
1504 | { | |
1505 | enum xp_retval ret = xpSuccess; | |
1506 | struct xpc_send_msg_slot_uv *msg_slot = NULL; | |
1507 | struct xpc_notify_mq_msg_uv *msg; | |
1508 | u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV]; | |
1509 | size_t msg_size; | |
1510 | ||
1511 | DBUG_ON(notify_type != XPC_N_CALL); | |
1512 | ||
1513 | msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size; | |
1514 | if (msg_size > ch->entry_size) | |
1515 | return xpPayloadTooBig; | |
1516 | ||
1517 | xpc_msgqueue_ref(ch); | |
1518 | ||
1519 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1520 | ret = ch->reason; | |
1521 | goto out_1; | |
1522 | } | |
1523 | if (!(ch->flags & XPC_C_CONNECTED)) { | |
1524 | ret = xpNotConnected; | |
1525 | goto out_1; | |
1526 | } | |
1527 | ||
1528 | ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot); | |
1529 | if (ret != xpSuccess) | |
1530 | goto out_1; | |
1531 | ||
1532 | if (func != NULL) { | |
1533 | atomic_inc(&ch->n_to_notify); | |
1534 | ||
1535 | msg_slot->key = key; | |
69b3bb65 | 1536 | smp_wmb(); /* a non-NULL func must hit memory after the key */ |
bd3e64c1 DN |
1537 | msg_slot->func = func; |
1538 | ||
1539 | if (ch->flags & XPC_C_DISCONNECTING) { | |
1540 | ret = ch->reason; | |
1541 | goto out_2; | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer; | |
1546 | msg->hdr.partid = xp_partition_id; | |
1547 | msg->hdr.ch_number = ch->number; | |
1548 | msg->hdr.size = msg_size; | |
1549 | msg->hdr.msg_slot_number = msg_slot->msg_slot_number; | |
1550 | memcpy(&msg->payload, payload, payload_size); | |
1551 | ||
6f2584f4 JS |
1552 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
1553 | msg_size); | |
bd3e64c1 DN |
1554 | if (ret == xpSuccess) |
1555 | goto out_1; | |
1556 | ||
1557 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1558 | out_2: | |
1559 | if (func != NULL) { | |
1560 | /* | |
1561 | * Try to NULL the msg_slot's func field. If we fail, then | |
1562 | * xpc_notify_senders_of_disconnect_uv() beat us to it, in which | |
1563 | * case we need to pretend we succeeded to send the message | |
1564 | * since the user will get a callout for the disconnect error | |
1565 | * by xpc_notify_senders_of_disconnect_uv(), and to also get an | |
1566 | * error returned here will confuse them. Additionally, since | |
1567 | * in this case the channel is being disconnected we don't need | |
1568 | * to put the the msg_slot back on the free list. | |
1569 | */ | |
1570 | if (cmpxchg(&msg_slot->func, func, NULL) != func) { | |
1571 | ret = xpSuccess; | |
1572 | goto out_1; | |
1573 | } | |
1574 | ||
1575 | msg_slot->key = NULL; | |
1576 | atomic_dec(&ch->n_to_notify); | |
1577 | } | |
1578 | xpc_free_msg_slot_uv(ch, msg_slot); | |
1579 | out_1: | |
1580 | xpc_msgqueue_deref(ch); | |
1581 | return ret; | |
1582 | } | |
1583 | ||
1584 | /* | |
1585 | * Tell the callers of xpc_send_notify() that the status of their payloads | |
1586 | * is unknown because the channel is now disconnecting. | |
1587 | * | |
1588 | * We don't worry about putting these msg_slots on the free list since the | |
1589 | * msg_slots themselves are about to be kfree'd. | |
1590 | */ | |
1591 | static void | |
1592 | xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch) | |
1593 | { | |
1594 | struct xpc_send_msg_slot_uv *msg_slot; | |
1595 | int entry; | |
1596 | ||
1597 | DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING)); | |
1598 | ||
1599 | for (entry = 0; entry < ch->local_nentries; entry++) { | |
1600 | ||
1601 | if (atomic_read(&ch->n_to_notify) == 0) | |
1602 | break; | |
1603 | ||
1604 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; | |
1605 | if (msg_slot->func != NULL) | |
1606 | xpc_notify_sender_uv(ch, msg_slot, ch->reason); | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | /* | |
1611 | * Get the next deliverable message's payload. | |
1612 | */ | |
1613 | static void * | |
1614 | xpc_get_deliverable_payload_uv(struct xpc_channel *ch) | |
1615 | { | |
1616 | struct xpc_fifo_entry_uv *entry; | |
1617 | struct xpc_notify_mq_msg_uv *msg; | |
1618 | void *payload = NULL; | |
1619 | ||
1620 | if (!(ch->flags & XPC_C_DISCONNECTING)) { | |
1621 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list); | |
1622 | if (entry != NULL) { | |
1623 | msg = container_of(entry, struct xpc_notify_mq_msg_uv, | |
1624 | hdr.u.next); | |
1625 | payload = &msg->payload; | |
1626 | } | |
1627 | } | |
1628 | return payload; | |
1629 | } | |
1630 | ||
1631 | static void | |
1632 | xpc_received_payload_uv(struct xpc_channel *ch, void *payload) | |
e17d416b | 1633 | { |
bd3e64c1 DN |
1634 | struct xpc_notify_mq_msg_uv *msg; |
1635 | enum xp_retval ret; | |
1636 | ||
1637 | msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload); | |
1638 | ||
1639 | /* return an ACK to the sender of this message */ | |
1640 | ||
1641 | msg->hdr.partid = xp_partition_id; | |
1642 | msg->hdr.size = 0; /* size of zero indicates this is an ACK */ | |
1643 | ||
6f2584f4 | 1644 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
bd3e64c1 DN |
1645 | sizeof(struct xpc_notify_mq_msghdr_uv)); |
1646 | if (ret != xpSuccess) | |
1647 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); | |
1648 | ||
1649 | msg->hdr.msg_slot_number += ch->remote_nentries; | |
e17d416b DN |
1650 | } |
1651 | ||
a7665b0a RH |
1652 | static struct xpc_arch_operations xpc_arch_ops_uv = { |
1653 | .setup_partitions = xpc_setup_partitions_uv, | |
1654 | .teardown_partitions = xpc_teardown_partitions_uv, | |
1655 | .process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv, | |
1656 | .get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv, | |
1657 | .setup_rsvd_page = xpc_setup_rsvd_page_uv, | |
1658 | ||
1659 | .allow_hb = xpc_allow_hb_uv, | |
1660 | .disallow_hb = xpc_disallow_hb_uv, | |
1661 | .disallow_all_hbs = xpc_disallow_all_hbs_uv, | |
1662 | .increment_heartbeat = xpc_increment_heartbeat_uv, | |
1663 | .offline_heartbeat = xpc_offline_heartbeat_uv, | |
1664 | .online_heartbeat = xpc_online_heartbeat_uv, | |
1665 | .heartbeat_init = xpc_heartbeat_init_uv, | |
1666 | .heartbeat_exit = xpc_heartbeat_exit_uv, | |
1667 | .get_remote_heartbeat = xpc_get_remote_heartbeat_uv, | |
1668 | ||
1669 | .request_partition_activation = | |
1670 | xpc_request_partition_activation_uv, | |
1671 | .request_partition_reactivation = | |
1672 | xpc_request_partition_reactivation_uv, | |
1673 | .request_partition_deactivation = | |
1674 | xpc_request_partition_deactivation_uv, | |
1675 | .cancel_partition_deactivation_request = | |
1676 | xpc_cancel_partition_deactivation_request_uv, | |
1677 | ||
1678 | .setup_ch_structures = xpc_setup_ch_structures_uv, | |
1679 | .teardown_ch_structures = xpc_teardown_ch_structures_uv, | |
1680 | ||
1681 | .make_first_contact = xpc_make_first_contact_uv, | |
1682 | ||
1683 | .get_chctl_all_flags = xpc_get_chctl_all_flags_uv, | |
1684 | .send_chctl_closerequest = xpc_send_chctl_closerequest_uv, | |
1685 | .send_chctl_closereply = xpc_send_chctl_closereply_uv, | |
1686 | .send_chctl_openrequest = xpc_send_chctl_openrequest_uv, | |
1687 | .send_chctl_openreply = xpc_send_chctl_openreply_uv, | |
1688 | .send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv, | |
1689 | .process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv, | |
1690 | ||
1691 | .save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv, | |
1692 | ||
1693 | .setup_msg_structures = xpc_setup_msg_structures_uv, | |
1694 | .teardown_msg_structures = xpc_teardown_msg_structures_uv, | |
1695 | ||
1696 | .indicate_partition_engaged = xpc_indicate_partition_engaged_uv, | |
1697 | .indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv, | |
1698 | .assume_partition_disengaged = xpc_assume_partition_disengaged_uv, | |
1699 | .partition_engaged = xpc_partition_engaged_uv, | |
1700 | .any_partition_engaged = xpc_any_partition_engaged_uv, | |
1701 | ||
1702 | .n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv, | |
1703 | .send_payload = xpc_send_payload_uv, | |
1704 | .get_deliverable_payload = xpc_get_deliverable_payload_uv, | |
1705 | .received_payload = xpc_received_payload_uv, | |
1706 | .notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv, | |
1707 | }; | |
1708 | ||
5b8669df | 1709 | int |
94bd2708 DN |
1710 | xpc_init_uv(void) |
1711 | { | |
a7665b0a | 1712 | xpc_arch_ops = xpc_arch_ops_uv; |
bd3e64c1 DN |
1713 | |
1714 | if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) { | |
1715 | dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n", | |
1716 | XPC_MSG_HDR_MAX_SIZE); | |
1717 | return -E2BIG; | |
1718 | } | |
5b8669df | 1719 | |
2525789b DN |
1720 | xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, |
1721 | XPC_ACTIVATE_IRQ_NAME, | |
5b8669df | 1722 | xpc_handle_activate_IRQ_uv); |
2525789b DN |
1723 | if (IS_ERR(xpc_activate_mq_uv)) |
1724 | return PTR_ERR(xpc_activate_mq_uv); | |
5b8669df | 1725 | |
2525789b DN |
1726 | xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, |
1727 | XPC_NOTIFY_IRQ_NAME, | |
bd3e64c1 | 1728 | xpc_handle_notify_IRQ_uv); |
2525789b DN |
1729 | if (IS_ERR(xpc_notify_mq_uv)) { |
1730 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
1731 | return PTR_ERR(xpc_notify_mq_uv); | |
bd3e64c1 DN |
1732 | } |
1733 | ||
5b8669df | 1734 | return 0; |
94bd2708 DN |
1735 | } |
1736 | ||
1737 | void | |
1738 | xpc_exit_uv(void) | |
1739 | { | |
2525789b DN |
1740 | xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); |
1741 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); | |
94bd2708 | 1742 | } |